Sleepfan

ABSTRACT

A sleepfan has a housing having a lower base and a stem extending upward from the lower base. A cross-flow fan having an axil is disposed in the base between the spacing side walls. A plurality of air intake vents is defined in the pair of spacing side walls. An electric motor is disposed in the base and driving the cross-flow fan. An air orienting device has a body covering on and slidable with respect to the stem and a head in an angle with respect to the body.

CROSS-REFERENCE TO RELATED APPLICATIONS

Not Applicable

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not Applicable

INCORPORATION-BY-REFERENCE OF MATERIAL SUBMITTED ON A COMPACT DISC

Not Applicable

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a sleepfan, and more particularly, to an energy-efficient, tranquil, and high adaptable device for ventilating air to a specific area.

2. Description of Related Art

In a U.S. patent application 2010/0221994, Tompkins discloses a portable ventilation system useful for providing a moving current of ventilating air having a base portion and at least one fan disposed in the base portion for causing ambient air to flow upward. The base portion has a hollow interior portion and at least one inlet opening through which air may be admitted. This device is useful for generating a conduit air flow to a desired place. However, it still has some drawbacks. First, although the system may have more than one fan and corresponding inlet opening, all the fans and inlet openings must be disposed on one side of the base portion. An opposite side of each fan has to be enclosed in order to produce an upward air flow. This will lower an adaptability of the device: if some ambient object blocks the one side of the base portion on which the inlet opening is defined, a user has to move or overturn the whole ventilation device. Second, one fan has one according inlet opening, no more or less, and an area of the inlet opening has to be basically the same as an area of the corresponding fan. A bigger inlet opening will debase a flow of the current and a smaller inlet opening will reduce an efficiency of the fan. Thus, a speed of the flow passing by the inlets and fans will be high. It will be desirable that a device having a bigger inlet area which is able to lower a flow speed is provided. A bigger inlet area brings a lower flow speed, which will reduce a noise caused by the air flow and save an energy required by the fan to produce high speed air current.

BRIEF SUMMARY OF THE INVENTION

The main object of the invention is to provide a sleepfan which is high adaptable. A user no longer has to move or overturn the whole ventilation device when some ambient object blocks either side wall of a base thereof.

Another object of the invention is to provide a sleepfan which is energy efficient and tranquil. A much bigger area of air intake vents is able to be provided irrelevant to an area leaves of a fan. A slow speed of air flow is achieved, which brings a low noise and high energy efficiency.

In order to accomplish the above objects, the present invention provides a sleepfan has a housing having a lower base and a stem extending upward from the lower base. The lower base has a pair of spacing side walls and a bottom being able to be placed on the ground. A cross-flow fan having an axil and an air outlet pipe in communication with the stem is disposed in the base between the spacing side walls with the axil being basically to both the bottom and the spacing side walls. A plurality of air intake vents is defined in the pair of spacing side walls. An electric motor is disposed in the base and driving the cross-flow fan. An air orienting device has a body covering on and slidable with respect to the stem and a head in an angle with respect to the body.

These and other objectives, features, and advantages of the present invention will become apparent from the following detailed description, the accompanying drawings, and the appended claims.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a schematic perspective view of the preferred embodiment of a sleepfan of the invention.

FIG. 2 is a cross-sectional view of the sleepfan shown in FIG. 1. And,

FIG. 3 is an exploded perspective view of the sleepfan shown in FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

As shown in FIGS. 1, 2, and 3, the preferred embodiment of the sleepfan 1 of the invention has a housing 10 having a lower base 11 and a stem 12 extending upward from the lower base 11. The lower base 11 has a pair of spacing side walls 13 and a bottom 14 which is able to be placed on the ground. A cross-flow fan 20 having an axil 21 is disposed in the base 11 of the housing 10 between the spacing side walls 13 with the axil 21 thereof being basically parallel to both the bottom 14 and the spacing side walls 13. A plurality of air intake vents 15 are defined in the pair of spacing side walls 13 of the base 11 in accordance with the cross-flow fan 20. The cross-flow fan 20 further has an air outlet pipe 22 in communication with the stem 12.

The cross-flow fan 20 is driven by an electric motor 23 disposed in the base 11. Though the cross-flow fan 20 is able to be driven by any kind of motor without departure from the principle of the invention, an energy saving motor is preferred. On/off, speed and/or work time of the motor 23 is able to be controlled by either a round twist control installed on the housing 10 of the sleepfan 1 or a remote control. Control of a fan is a conventional skill and will not be described here in detail. One frame 30 is provided between the cross-flow fan 20 and each side wall 13. One dust isolation net 31 is attached to each frame 30. An air orienting device 40 is provided having a body 41 covering on and slidable with respect to the stem 12 and a head 42 in an angle with respect to the body 41 in order for guiding air flow to a specified area.

In use, a user is able to place the sleepfan 1 of the invention at a specific place and then adjust a height and orientation of the head 42 to face a specified area desirable for air flow. When the electric motor 23 is turned on, the cross-flow fan 20 is driven to work. Ambient air flows into the cross-flow fan 20 through the air intake vents 15 in both of the pair of spacing side walls 13. Then the air flows upward via the air outlet pipe 22, the stem 12 of the housing 10 and the air orienting device 40, and goes out from the head 42 to a specified area.

It could be seen from above description that a total area of the plurality of air intake vents 15 has no longer to be in accordance with an area of a fan. For a same flow rate as conventional fan, the total area of air intake vents becomes much greater and a speed of air passing by the air intake vents 15 is much smaller, which significantly reduce an air flow noise. At the same time, as the speed of the intake air flow is reduced, a speed of the cross-flow fan is much decreased. The electric motor 23 is becoming energy saving. Second, an opposite space of a conventional fan in the housing no longer has to be enclosed and both side walls 13 are able to have air intake vents 15. The user does not have to move or overturn the sleepfan 1 when some ambient object blocks either side wall 15 of the lower base 11. The sleepfan 1 becomes more adaptable.

From above description, it is seen that the objects of the present invention have been fully and effectively accomplished. Embodiment of the invention has been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from the invention's principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims. 

1. A sleepfan comprising: a housing having a lower base and a stem extending upward from said lower base, said lower base having a pair of spacing side walls and a bottom being able to be placed on the ground, a cross-flow fan having an axil and an air outlet pipe in communication with said stem, said cross-flow fan being disposed in said base between said spacing side walls with said axil being basically to both said bottom and said spacing side walls, a plurality of air intake vents defined in said pair of spacing side walls, an electric motor disposed in said base and driving said cross-flow fan, and, an air orienting device having a body covering on and slidable with respect to said stem and a head in an angle with respect to said body.
 2. The sleepfan as claimed in claim 1, wherein said sleepfan further has one frame between said cross-flow fan and each said side wall, and one dust isolation net attached to each said frame. 